On Sun, Mar 15, 2009 at 4:53 PM, Philip Kime <phi...@kime.org.uk> wrote: > With a minor change, this worked perfectly - many thanks to both people who > responded. I am simply unaware of a lot of the API here so hadn't looked at > these functions.
It's worth noting that you're going about this problem a bit backwards. Typically, one maintains the view's state separate from its actual window buffer, using this state information inside of -drawRect:. Relying on your window's backing store to remain unchanged so that you can reverse the effects of your previous drawing is perilous, since any code at any time can call -lockFocus on your view/window and doodle all over your previous drawing. In fact, this is precisely what the focus ring does. Your best bet is to instead store a flag and use that flag's value to change how you draw inside -drawRect:. Use -setNeedsDisplayInRect: to tell your view to redraw. --Kyle Sluder _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
